activity/æk'tɪvətɪ/

n.

➊ sth you spend time doing

➋ a situation in which a lot of things are happening or being done

n. 〖复-ties/-tɪz/〗

➊ [C，常 activities] 活动：sporting activities 体育活动

◇classroom activities 课堂活动

◇terrorist activities 恐怖主义活动

◇recreational activities 娱乐活动

◇The Sun's activity has a strong influence on the Earth. 太阳活动对地球有很大的影响。

➋ [U] 热闹，繁忙：The street is full of activity. 街上非常热闹

构词active + -ity

音组-ity/-əty/

ability; activity; quality; reality